<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        .form-preview {
            position: relative;
            display: flex;
            align-items: center;
        }

        .form-preview h2 {
            font-size: 18px;
            font-weight: normal;
        }

        .form-preview small {
            font-size: 12px;
            display: inline-block;
            padding: 2px 6px;
            background: #27ba9b;
            color: #fff;
            border-radius: 2px;
            transform: scale(0.8);
        }

        .form-preview .btn-edit {
            font-size: 12px;
            display: none;
            text-decoration: none;
            color: #069;
            margin-left: 20px;
        }

        .form-preview:hover .btn-edit {
            display: block;
        }

        .form-edit {
            padding-top: 20px;
        }

        .form-item {
            display: flex;
            margin-bottom: 20px;
            align-items: center;
        }

        .form-item .label {
            width: 60px;
            text-align: right;
            font-size: 14px;
        }

        .form-item .input {
            flex: 1;
        }

        .form-item input,
        .form-item select {
            appearance: none;
            outline: none;
            border: 1px solid #ccc;
            width: 200px;
            height: 40px;
            box-sizing: border-box;
            padding: 10px;
            color: #666;
        }

        .form-item input::placeholder {
            color: #666;
        }

        .form-item .cancel,
        .form-item .submit {
            appearance: none;
            outline: none;
            border: 1px solid #ccc;
            border-radius: 4px;
            padding: 4px 10px;
            margin-right: 10px;
            font-size: 12px;
            background: #ccc;
        }

        .form-item .submit {
            border-color: #069;
            background: #069;
            color: #fff;
        }
    </style>
</head>

<body>
    <div id="app">
        <div class="article-case">
            <div class="form-preview">
                <h2>{{ news.title }}</h2>
                <small>{{ news.channel }}</small>
                <a @click.prevent="doEdit" class="btn-edit" href="#">编辑</a>
            </div>
            <div v-show="edit" class="form-edit">
                <div class="form-item">
                    <div class="label">标题：</div>
                    <div class="input">
                        <input v-model="editNews.title" type="text" placeholder="请输入标题" />
                    </div>
                </div>
                <div class="form-item">
                    <div class="label">频道：</div>
                    <div class="input">
                        <select v-model="editNews.channel">
                            <option value="">请选择频道</option>
                            <option value="前端">前端</option>
                            <option value="运维">运维</option>
                            <option value="测试">测试</option>
                        </select>
                    </div>
                </div>
                <div class="form-item">
                    <div class="label"></div>
                    <div class="input">
                        <button @click="edit = false" class="cancel">取消</button>
                        <button @click="save" class="submit">确认</button>
                    </div>
                </div>
            </div>
        </div>
    </div>

    <script src="./vue.js"></script>
    <script>
        new Vue({
            el: '#app',
            data() {
                return {
                    edit: false,
                    news: {
                        title: '如何成为一名前端老鸟？',
                        channel: '前端',
                    },
                    editNews: {
                        title: '',
                        channel: ''
                    }
                };
            },
            methods: {
                doEdit () {
                    // 显示出表单
                    this.edit = true
                    // 赋值
                    // this.editNews.title = this.news.title
                    // this.editNews.channel = this.news.channel
                    // 浅拷贝
                    this.editNews = {
                        ...this.news
                    }
                },

                save () {
                    // 把editNews赋值给news
                    this.news = {
                        ...this.editNews
                    }
                    // 隐藏
                    this.edit = false
                }
            }
        })
    </script>
</body>

</html>